Monitoring the atmospheric turbulence profile with high vertical resolution with the PML instrument

Julien Chabé; Eric Aristidi; Aziz Ziad; Yan Fantei-Caujolle; Henri Lantéri; Christophe Giordano; Julien Borgnino; Catherine Renaud

doi:10.1117/12.2562130

13 December 2020 Monitoring the atmospheric turbulence profile with high vertical resolution with the PML instrument

Julien Chabé, Eric Aristidi, Aziz Ziad, Yan Fantei-Caujolle, Henri Lantéri, Christophe Giordano, Julien Borgnino, Catherine Renaud

Author Affiliations +

Proceedings Volume 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX; 114502W (2020) https://doi.org/10.1117/12.2562130
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Wide-Field Adaptive Optics systems will be a key component of the future generation of Extremely Large Telescopes. All the components of such Adaptive Optics systems have to be precisely specified using the atmospheric turbulence parameters of the site, particularly the profile of the refractive index structure constant C²_n (h). The monitor PML (Profiler of Moon Limb), for the extraction of the C²_n(h) profile with high vertical resolution for nighttime and daytime conditions, has been developed and is now routinely exploited at the Calern Observatory (French Riviera). The PML instrument uses a differential method with two small subapertures mask through which the Moon limb or Sun edge are observed leading to a continuum of double stars allowing a scan of the whole atmosphere with high resolution in altitude. In addition, PML provides, in real time, a complete characterization of the atmospheric turbulence since it is able to measure the other turbulence parameters like the total seeing and the isoplanatic angle.

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Julien Chabé, Eric Aristidi, Aziz Ziad, Yan Fantei-Caujolle, Henri Lantéri, Christophe Giordano, Julien Borgnino, and Catherine Renaud "Monitoring the atmospheric turbulence profile with high vertical resolution with the PML instrument", Proc. SPIE 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX, 114502W (13 December 2020); https://doi.org/10.1117/12.2562130

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